Let's roll up our sleeves and solve this. We have 634 and we're going to multiply it by 41, essentially adding 634 to itself 41 times.
Step 1: 0 + 634 = 634
Step 2: 634 + 634 = 1268
Step 3: 1268 + 634 = 1902
Step 4: 1902 + 634 = 2536
Step 5: 2536 + 634 = 3170
Step 6: 3170 + 634 = 3804
Step 7: 3804 + 634 = 4438
Step 8: 4438 + 634 = 5072
Step 9: 5072 + 634 = 5706
Step 10: 5706 + 634 = 6340
Step 11: 6340 + 634 = 6974
Step 12: 6974 + 634 = 7608
Step 13: 7608 + 634 = 8242
Step 14: 8242 + 634 = 8876
Step 15: 8876 + 634 = 9510
Step 16: 9510 + 634 = 10144
Step 17: 10144 + 634 = 10778
Step 18: 10778 + 634 = 11412
Step 19: 11412 + 634 = 12046
Step 20: 12046 + 634 = 12680
Step 21: 12680 + 634 = 13314
Step 22: 13314 + 634 = 13948
Step 23: 13948 + 634 = 14582
Step 24: 14582 + 634 = 15216
Step 25: 15216 + 634 = 15850
Step 26: 15850 + 634 = 16484
Step 27: 16484 + 634 = 17118
Step 28: 17118 + 634 = 17752
Step 29: 17752 + 634 = 18386
Step 30: 18386 + 634 = 19020
Step 31: 19020 + 634 = 19654
Step 32: 19654 + 634 = 20288
Step 33: 20288 + 634 = 20922
Step 34: 20922 + 634 = 21556
Step 35: 21556 + 634 = 22190
Step 36: 22190 + 634 = 22824
Step 37: 22824 + 634 = 23458
Step 38: 23458 + 634 = 24092
Step 39: 24092 + 634 = 24726
Step 40: 24726 + 634 = 25360
Step 41: 25360 + 634 = 25994

So, 634*41 = 25994